JPH10270141A - Brush holder and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To greatly facilitate the assembling work of a brush holder by connecting a terminal with a brush in a main body part from a lower side, inserting lead wires connected to a connector from an upper side to be stacked with the terminal and spot-welding these via a window opened in the main body part. SOLUTION: A terminal connected to a brush 56 is inserted into the main body part 2 of a brush holder 1 from its lower side via a lead wire having a spring outside beforehand, and the upper end of the terminal is brought to the position of a spot window 10 opened in the main body part 2. From the upper side of the main body part 2, a lead wire 3a connected to a connector 4 is inserted, and this lead wire 3a is contacted with the upper end part of the terminal in a stacked manner. In this condition, the tip of a spot welder is inserted from the outside of the spot window 10, the terminal and the lead wire 3a are welded together by holding the tip between both sides, and by fixing these the brush holder 1 is manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brush holder and a method for manufacturing the same.

[0002]

2. Description of the Related Art A conventional brush holder 57 is constructed, for example, as shown in the sectional view of FIG. 7, and the brush 56 is inserted into a lower end of a main body 58 of the brush holder 57. The brush 56 is attached while being constantly urged downward by a spring 60. The lead wire 59 connected to the brush 56
Is inserted from below into a round hole 58a opened at the lower part of the main body 58, and the connector 63 at the upper end of the main body 58 is inserted.
Lead wire 64 of the connector side inserted from above into
Is connected to the lead wire 59 by a caulking fitting 65 or the like in the main body 58. In FIG. 7, a cover substrate 62 is provided on the upper end side of the main body 58 with a rubber ring 61 interposed therebetween. The cover substrate 62
The connector portion 63 is formed integrally with the connector. In addition, a bolt insertion collar 66 is provided on the cover substrate 62 so that a mounting bolt can be inserted through the cover substrate 62 in the vertical direction.

In such a conventional brush holder 57, a lead wire 59 connected to the brush 56 is passed through a round hole 58a of a brush holder main body 58 and swaged by a caulking fitting 65 inside the main body 58. Work is required, and at this time the spring 60 is interposed,
Due to the urging force of the spring 60, the work of caulking the metal fitting 65 becomes very difficult, and the assembling work of the brush holder 57 becomes extremely difficult.

In the brush holder 57 having the conventional structure, the connector 63 is integrally formed with the cover substrate 62.
Therefore, even if it is desired to change the connector part according to the manufacturer's standard or the like, only the connector part 63 cannot be changed, and the molding die of the entire brush holder 57 must be changed. However, there is a problem that the cost increases.

[0005]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above-mentioned conventional problems, and has been developed to provide a brush holder for an electromagnetic powder clutch in which a connector can be easily replaced and changed according to a request from a manufacturer or the like. A first gist of the present invention is that a separate connector is interchangeably connected to the other end of the main body having a brush attached to one end thereof. Another object of the present invention is to provide a method for manufacturing a brush holder that facilitates assembly of a brush holder and facilitates manufacture. A second gist of the present invention is to provide a brush holder having a brush inserted into a lower end thereof. A terminal connected to the brush is inserted from a lower side of the main body of the brush holder, a lead wire connected to a connector is inserted from an upper side of the main body, the terminals are overlapped with each other, and an opening is formed in the main body. That is, the tip of the spot welding machine was inserted into the spot window from the outside, and the lead wire was welded to the terminal.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of the brush holder 1.
FIG. 2 is an external configuration diagram. The brush holder 1 is disposed, for example, on the side of the electromagnetic powder clutch 51 shown in FIG. 6 and supplies an electric current to the coil 55 of the electromagnetic powder clutch 51 from the outside via the slip ring 52. 1 is formed in a vertically long cylindrical shape, and a pair of brushes 56, 56
Are attached in a plug-like manner, and a mounting flange 5 is integrally formed on the upper end side of the main body 2 so as to expand outward in diameter, and an O-ring 8 is externally fitted on a lower outer periphery of the mounting flange 5. The O-ring 8 is configured to ensure watertightness with a case (not shown) that covers the brush holder 1.

[0007] A pair of bolt insertion collars 16, 16 for inserting mounting bolts are fitted into the mounting flange 5. , A central hole 12a is formed,
The lead wire 3 of the harness 3 is inserted into the center hole 12a from above.
a is inserted so that the lead wire 3 a can be connected to the brushes 56, 56, and a separate connector 4 is connected to the upper end of the harness 3.

A connection terminal is connected to the connector 4 from a power supply side mounted on the body of the automobile, and the brush 56
In this example, since the connector 4 is formed separately from the main body 2, the connector 4 can be easily changed. When it is desired to change the type of the brush 4, the connector 4 is replaced with another type, and the lead wire 3 a is inserted through the central hole 12, and the brushes 56, 56 are inserted.
If the main body 2 and the mounting flange 5 are integrally formed, this portion is of one type and can be adapted to the standards of all manufacturers.
It is not necessary to change the entire brush holder for each maker as in the related art, and it is possible to easily change only the connector 4 portion, thereby significantly reducing the cost.

A grommet 6 for waterproofing is integrally fitted into the center hole 12a. The grommet 6 is fitted when the main body 2 is molded with resin.
Are fixed in the mounting flange 5 by contracting during molding. The main body 2 has an internal structure as shown in the enlarged cross-sectional view of FIG. The brush insertion hole 12
The inner peripheral surface is mirror-finished,
A concave portion 2a is formed in the side surface of the main body 2 in a concave shape, and a spot window 10 is formed to penetrate and open in a lateral direction so as to face the concave portion 2a.

A terminal 14 connected to a brush 56 as shown in FIG. 4 via a lead wire 15 is inserted into the main body 2 from below. A spring 13 is previously arranged outside the lead wire 15 connecting the brush 56 and the terminal 14, and in this state, the terminal 14 is inserted into the brush insertion hole 12 from below.
In the inserted state, the terminal 14 is inserted inside the concave portion 2 a of the main body 2, and the upper end reaches the position of the spot window 10. From above the main body 2, the lead wire 3 a connected to the connector 4 is inserted into the vertical hole 11 in the main body 2 through the lead wire holes 6 a and 6 a of the grommet 6, and the lead wire 3 a is connected to the terminal 14. The upper end is abutted in a polymerized manner. In this state, a tip of a spot welding machine (not shown) is inserted from the outside of the spot window 10, the tip is sandwiched from both sides, and the terminal 14 and the lower end of the lead wire 3a are spot-welded with the tip to weld them together. Can be done.

Therefore, in this embodiment, it is possible to insert the terminal 14 of the brush 56 into the main body 2 from below, insert the lead wire 3a of the connector 4 from above, and weld the two together by spot welding from outside. As a result, as compared with the conventional method, the assembling work can be performed extremely easily as compared with the use of the caulking metal fitting, the workability is good, the manufacture of the brush holder 1 is easy, the number of parts is smaller than in the conventional case, and the cost is reduced. Thus, the brush holder 1 can be manufactured with a reduced amount.

Incidentally, in order to further improve the insertion state of the terminal 14, a structure as shown in the perspective view of FIG. 5 can be adopted. That is, in FIG. 5, guide grooves 12a, 12a are formed in the upper end inside the brush insertion hole 12 of the main body 2 of the brush holder 1 so as to face each other in the lateral direction, while the terminal 14 has a circular tip. A brush 56 is formed on the arcuate tip radius portion 14a, and is formed to protrude to both sides to form guide flange pieces 14b, 14b.
The lead wire 15 connected to the terminal 1 is previously welded to the terminal 14 by spot welding.
4 is inserted into the brush insertion hole 12 from the front end side, a guide flange piece 14b is inserted into the guide groove 12a, and is guided by the guide groove 12a so that the terminal 14 is satisfactorily inserted into the brush insertion hole 12. It can be inserted into the upper end side, the insertion work can be performed smoothly, and the assembly work can be performed more easily. If the guide groove 12a is formed in a tapered shape toward the upper end, the terminal 14 can be inserted more favorably.
The brush holder 1 can also be used for a device having a distance between the power supply ring (slip ring) and the holder, for example, a clutch.

[0013]

According to the present invention, since a separate connector is replaceably connected to the other end of the main body having the brush attached to one end, the connector is separate. It can be easily changed, and the main body can be of a uniform type, so there is no need to change the entire brush holder according to the standard of the manufacturer etc. as in the past, greatly reducing costs This has the effect that the brush holder can be configured in such a manner.

A brush holder having a brush inserted into a lower end thereof, wherein a terminal connected to the brush is inserted from a lower side of a main body of the brush holder.
A lead wire connected to a connector is inserted from the upper side of the main body portion and overlapped with the terminal, and a tip of a spot welding machine is inserted from the outside into a spot window opened in the main body portion and the lead wire is connected to the terminal. The terminal connected to the brush is inserted from the lower side into the main body of the brush holder, and the lead wire connected to the connector is inserted from the upper side, and can be welded and connected by spot welding from the outside, This eliminates the need for caulking work as in the past, makes it extremely easy to assemble the brush holder, reduces the number of parts, makes it easier to manufacture the brush holder, and reduces the cost of the brush holder. Having.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a brush holder.

FIG. 2 is an overall external configuration diagram of a brush holder.

FIG. 3 is a sectional configuration diagram of a main body of the brush holder.

FIG. 4 shows a terminal welded in a brush holder;
It is the schematic which shows the arrangement structure with the lead wire of a connector.

FIG. 5 is an exploded configuration view showing an example for facilitating insertion of a terminal.

FIG. 6 is a half sectional configuration view of an electromagnetic powder clutch.

FIG. 7 is a cross-sectional configuration diagram of a conventional brush holder.

[Explanation of symbols]

 Reference Signs List 51 electromagnetic powder clutch 56 brush 1 brush holder 2 main body 3 harness 3a lead wire 4 connector 6 grommet (rubber for waterproofing) 8 O-ring 10 spot window 11 vertical hole 12 brush insertion hole 12a guide groove 13 spring 14 terminal 14b guide Collar

Claims (2)

[Claims] 1. A brush holder, wherein a separate connector is interchangeably connected to the other end of the main body having a brush attached to one end. 2. A brush holder having a brush inserted into a lower end thereof, wherein a terminal connected to the brush is inserted from a lower side of a main body of the brush holder, and a terminal is connected to a connector from an upper side of the main body. The connected lead wire is inserted and polymerized on the terminal, and a tip of a spot welding machine is inserted from outside into a spot window opened in the main body, and the lead wire is welded to the terminal. Manufacturing method of brush holder.